|Guinea Pigs Add Up
Walker & Company, a division of Bloomsbury Publishing, Inc., 2010
Ill. by Tracey Campbell Pearson
(Hardcover ISBN: 978-0-8027-9795-7)
Mr. Gilbert brings a guinea pig to school as a class pet, but it looks so lonely,
he then brings another, and before long the class is getting an unexpected
lesson in addition – and a very big cage.